Microwave oven



FIG. 1 is a perspective front view of a microwave oven showing our newdesign;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a perspective front view of FIG. 1, with the door shown in apartially open position.

The details shown in broken lines form no part of the claimed design.

The ornamental design for a microwave oven, as shown and described. 